Mr. MagicMan: Good-lucking Russian babe you found. The surplus ammo is gradually going up in price, and hope you order at least a few cans.
A regular seller on 'Gunbroker' (Ammo dept.) always has multiple cans of it at a decent price.
You will find some very enthusiastic MN fans at Gunandgame who are also quite well-versed with many series.
The MNs have their own forum and those guys really enjoy helping people out and joking about 'Mosinitis which, sadly has never been cured, even at the Mayo Clinic in Rochester, MN. I met one of the young guys and enjoyed shooting with him at a club range. Tried out his 91/30s and 91/59.
Plan to let him try my 44s and SKS.